Waves and Human Eye Unit

help me I'm cooked

whats the flipping order for the electromagnetic spectrum ( longest to shortest)

radiowaves, microwaves, infared, visible, UV, x rays, gamma rays

crest

The highest point of a wave.

Trough

– The lowest point of a wave.

wavelength

The distance between two crests or two troughs. It tells us how long a wave is.

Amplitude

The height of the wave from the middle to the crest or the middle to the trough. It tells us how much energy a wave has. Higher amplitude = more energy.

Frequency

The number of waves that pass a point in one second. It is measured in Hertz (Hz). Higher frequency = more waves per second.

Reflection –

when light bounces off a surface

Refraction

The bending of light as it passes from one medium to another (like air to water).

Absorption

When light is taken in by an object (not reflected or transmitted).

Cornea

Protects the eye and bends light into the eye

iris

Controls the size of the pupil  (colored part )

lens

focuses light on the retina

Retina

Contains the rods and cones that detect light

Optic Nerve

Sends visual information to the brain

tears

The cleaning system of the eyes

Mechanical Waves

Waves that need a medium (like air, water, or solid) to travel through (examples: sound waves, water waves).

Electromagnetic Waves

 Waves that do not need a medium to travel through (examples: sound waves, water waves).

Longitudinal Waves

Mechanical waves where the particles of the medium move side to side in the same direction as the wave (example: sound waves).

Transverse Waves

Waves where the particles move up and down, perpendicular to the direction the wave travels (example: light waves).

Waves

A disturbance or vibration that transmits energy through matter or an empty space.

Electromagnetic Spectrum

– All the types of electromagnetic waves, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.